Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IDE tuning and bus mastering support for the CS5510/CS5520 |
| 3 | * chipsets |
| 4 | * |
| 5 | * The CS5510/CS5520 are slightly unusual devices. Unlike the |
| 6 | * typical IDE controllers they do bus mastering with the drive in |
| 7 | * PIO mode and smarter silicon. |
| 8 | * |
| 9 | * The practical upshot of this is that we must always tune the |
| 10 | * drive for the right PIO mode. We must also ignore all the blacklists |
| 11 | * and the drive bus mastering DMA information. |
| 12 | * |
| 13 | * *** This driver is strictly experimental *** |
| 14 | * |
| 15 | * (c) Copyright Red Hat Inc 2002 |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or modify it |
| 18 | * under the terms of the GNU General Public License as published by the |
| 19 | * Free Software Foundation; either version 2, or (at your option) any |
| 20 | * later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, but |
| 23 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 25 | * General Public License for more details. |
| 26 | * |
| 27 | * For the avoidance of doubt the "preferred form" of this code is one which |
| 28 | * is in an open non patent encumbered format. Where cryptographic key signing |
| 29 | * forms part of the process of creating an executable the information |
| 30 | * including keys needed to generate an equivalently functional executable |
| 31 | * are deemed to be part of the source code. |
| 32 | * |
| 33 | */ |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/module.h> |
| 36 | #include <linux/types.h> |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/delay.h> |
| 39 | #include <linux/timer.h> |
| 40 | #include <linux/mm.h> |
| 41 | #include <linux/ioport.h> |
| 42 | #include <linux/blkdev.h> |
| 43 | #include <linux/hdreg.h> |
| 44 | |
| 45 | #include <linux/interrupt.h> |
| 46 | #include <linux/init.h> |
| 47 | #include <linux/pci.h> |
| 48 | #include <linux/ide.h> |
| 49 | #include <linux/dma-mapping.h> |
| 50 | |
| 51 | #include <asm/io.h> |
| 52 | #include <asm/irq.h> |
| 53 | |
| 54 | struct pio_clocks |
| 55 | { |
| 56 | int address; |
| 57 | int assert; |
| 58 | int recovery; |
| 59 | }; |
| 60 | |
| 61 | static struct pio_clocks cs5520_pio_clocks[]={ |
| 62 | {3, 6, 11}, |
| 63 | {2, 5, 6}, |
| 64 | {1, 4, 3}, |
| 65 | {1, 3, 2}, |
| 66 | {1, 2, 1} |
| 67 | }; |
| 68 | |
Bartlomiej Zolnierkiewicz | f212ff2 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 69 | static int cs5520_tune_chipset(ide_drive_t *drive, const u8 speed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { |
| 71 | ide_hwif_t *hwif = HWIF(drive); |
| 72 | struct pci_dev *pdev = hwif->pci_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | int pio = speed; |
| 74 | u8 reg; |
| 75 | int controller = drive->dn > 1 ? 1 : 0; |
| 76 | int error; |
Bartlomiej Zolnierkiewicz | f212ff2 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | switch(speed) |
| 79 | { |
| 80 | case XFER_PIO_4: |
| 81 | case XFER_PIO_3: |
| 82 | case XFER_PIO_2: |
| 83 | case XFER_PIO_1: |
| 84 | case XFER_PIO_0: |
| 85 | pio -= XFER_PIO_0; |
| 86 | break; |
| 87 | default: |
| 88 | pio = 0; |
| 89 | printk(KERN_ERR "cs55x0: bad ide timing.\n"); |
| 90 | } |
| 91 | |
| 92 | printk("PIO clocking = %d\n", pio); |
| 93 | |
| 94 | /* FIXME: if DMA = 1 do we need to set the DMA bit here ? */ |
| 95 | |
| 96 | /* 8bit CAT/CRT - 8bit command timing for channel */ |
| 97 | pci_write_config_byte(pdev, 0x62 + controller, |
| 98 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 99 | (cs5520_pio_clocks[pio].assert)); |
| 100 | |
| 101 | /* 0x64 - 16bit Primary, 0x68 - 16bit Secondary */ |
| 102 | |
| 103 | /* FIXME: should these use address ? */ |
| 104 | /* Data read timing */ |
| 105 | pci_write_config_byte(pdev, 0x64 + 4*controller + (drive->dn&1), |
| 106 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 107 | (cs5520_pio_clocks[pio].assert)); |
| 108 | /* Write command timing */ |
| 109 | pci_write_config_byte(pdev, 0x66 + 4*controller + (drive->dn&1), |
| 110 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 111 | (cs5520_pio_clocks[pio].assert)); |
| 112 | |
| 113 | /* Set the DMA enable/disable flag */ |
| 114 | reg = inb(hwif->dma_base + 0x02 + 8*controller); |
| 115 | reg |= 1<<((drive->dn&1)+5); |
| 116 | outb(reg, hwif->dma_base + 0x02 + 8*controller); |
| 117 | |
| 118 | error = ide_config_drive_speed(drive, speed); |
| 119 | /* ATAPI is harder so leave it for now */ |
| 120 | if(!error && drive->media == ide_disk) |
| 121 | error = hwif->ide_dma_on(drive); |
| 122 | |
| 123 | return error; |
| 124 | } |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame^] | 125 | |
| 126 | static void cs5520_set_pio_mode(ide_drive_t *drive, const u8 pio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | { |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame^] | 128 | cs5520_tune_chipset(drive, XFER_PIO_0 + pio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | static int cs5520_config_drive_xfer_rate(ide_drive_t *drive) |
| 132 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | /* Tune the drive for PIO modes up to PIO 4 */ |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame^] | 134 | ide_set_max_pio(drive); |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | /* Then tell the core to use DMA operations */ |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 137 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | /* |
| 141 | * We provide a callback for our nonstandard DMA location |
| 142 | */ |
| 143 | |
| 144 | static void __devinit cs5520_init_setup_dma(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *hwif) |
| 145 | { |
| 146 | unsigned long bmide = pci_resource_start(dev, 2); /* Not the usual 4 */ |
| 147 | if(hwif->mate && hwif->mate->dma_base) /* Second channel at primary + 8 */ |
| 148 | bmide += 8; |
| 149 | ide_setup_dma(hwif, bmide, 8); |
| 150 | } |
| 151 | |
| 152 | /* |
| 153 | * We wrap the DMA activate to set the vdma flag. This is needed |
| 154 | * so that the IDE DMA layer issues PIO not DMA commands over the |
| 155 | * DMA channel |
| 156 | */ |
| 157 | |
| 158 | static int cs5520_dma_on(ide_drive_t *drive) |
| 159 | { |
| 160 | drive->vdma = 1; |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | static void __devinit init_hwif_cs5520(ide_hwif_t *hwif) |
| 165 | { |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame^] | 166 | hwif->set_pio_mode = &cs5520_set_pio_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | hwif->speedproc = &cs5520_tune_chipset; |
| 168 | hwif->ide_dma_check = &cs5520_config_drive_xfer_rate; |
| 169 | hwif->ide_dma_on = &cs5520_dma_on; |
| 170 | |
| 171 | if(!noautodma) |
| 172 | hwif->autodma = 1; |
| 173 | |
| 174 | if(!hwif->dma_base) |
| 175 | { |
| 176 | hwif->drives[0].autotune = 1; |
| 177 | hwif->drives[1].autotune = 1; |
| 178 | return; |
| 179 | } |
| 180 | |
| 181 | hwif->atapi_dma = 0; |
| 182 | hwif->ultra_mask = 0; |
| 183 | hwif->swdma_mask = 0; |
| 184 | hwif->mwdma_mask = 0; |
| 185 | |
| 186 | hwif->drives[0].autodma = hwif->autodma; |
| 187 | hwif->drives[1].autodma = hwif->autodma; |
| 188 | } |
| 189 | |
| 190 | #define DECLARE_CS_DEV(name_str) \ |
| 191 | { \ |
| 192 | .name = name_str, \ |
| 193 | .init_setup_dma = cs5520_init_setup_dma, \ |
| 194 | .init_hwif = init_hwif_cs5520, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | .autodma = AUTODMA, \ |
| 196 | .bootable = ON_BOARD, \ |
Bartlomiej Zolnierkiewicz | a5d8c5c | 2007-07-20 01:11:55 +0200 | [diff] [blame] | 197 | .host_flags = IDE_HFLAG_ISA_PORTS, \ |
Bartlomiej Zolnierkiewicz | 4099d14 | 2007-07-20 01:11:59 +0200 | [diff] [blame] | 198 | .pio_mask = ATA_PIO4, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | static ide_pci_device_t cyrix_chipsets[] __devinitdata = { |
| 202 | /* 0 */ DECLARE_CS_DEV("Cyrix 5510"), |
| 203 | /* 1 */ DECLARE_CS_DEV("Cyrix 5520") |
| 204 | }; |
| 205 | |
| 206 | /* |
| 207 | * The 5510/5520 are a bit weird. They don't quite set up the way |
| 208 | * the PCI helper layer expects so we must do much of the set up |
| 209 | * work longhand. |
| 210 | */ |
| 211 | |
| 212 | static int __devinit cs5520_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| 213 | { |
Bartlomiej Zolnierkiewicz | 5cbf79c | 2007-05-10 00:01:11 +0200 | [diff] [blame] | 214 | ide_hwif_t *hwif = NULL, *mate = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | ata_index_t index; |
| 216 | ide_pci_device_t *d = &cyrix_chipsets[id->driver_data]; |
| 217 | |
| 218 | ide_setup_pci_noise(dev, d); |
| 219 | |
| 220 | /* We must not grab the entire device, it has 'ISA' space in its |
| 221 | BARS too and we will freak out other bits of the kernel */ |
Amit Gud | 1e39dea | 2005-11-18 23:03:19 +0100 | [diff] [blame] | 222 | if (pci_enable_device_bars(dev, 1<<2)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | printk(KERN_WARNING "%s: Unable to enable 55x0.\n", d->name); |
Amit Gud | 1e39dea | 2005-11-18 23:03:19 +0100 | [diff] [blame] | 224 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | pci_set_master(dev); |
| 227 | if (pci_set_dma_mask(dev, DMA_32BIT_MASK)) { |
| 228 | printk(KERN_WARNING "cs5520: No suitable DMA available.\n"); |
| 229 | return -ENODEV; |
| 230 | } |
| 231 | |
| 232 | index.all = 0xf0f0; |
| 233 | |
| 234 | /* |
| 235 | * Now the chipset is configured we can let the core |
| 236 | * do all the device setup for us |
| 237 | */ |
| 238 | |
| 239 | ide_pci_setup_ports(dev, d, 14, &index); |
| 240 | |
Bartlomiej Zolnierkiewicz | 5cbf79c | 2007-05-10 00:01:11 +0200 | [diff] [blame] | 241 | if ((index.b.low & 0xf0) != 0xf0) |
| 242 | hwif = &ide_hwifs[index.b.low]; |
| 243 | if ((index.b.high & 0xf0) != 0xf0) |
| 244 | mate = &ide_hwifs[index.b.high]; |
| 245 | |
| 246 | if (hwif) |
| 247 | probe_hwif_init(hwif); |
| 248 | if (mate) |
| 249 | probe_hwif_init(mate); |
| 250 | |
| 251 | if (hwif) |
| 252 | ide_proc_register_port(hwif); |
| 253 | if (mate) |
| 254 | ide_proc_register_port(mate); |
| 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | static struct pci_device_id cs5520_pci_tbl[] = { |
| 260 | { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5510, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| 261 | { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1}, |
| 262 | { 0, }, |
| 263 | }; |
| 264 | MODULE_DEVICE_TABLE(pci, cs5520_pci_tbl); |
| 265 | |
| 266 | static struct pci_driver driver = { |
| 267 | .name = "Cyrix_IDE", |
| 268 | .id_table = cs5520_pci_tbl, |
| 269 | .probe = cs5520_init_one, |
| 270 | }; |
| 271 | |
Bartlomiej Zolnierkiewicz | 82ab1ee | 2007-01-27 13:46:56 +0100 | [diff] [blame] | 272 | static int __init cs5520_ide_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | { |
| 274 | return ide_pci_register_driver(&driver); |
| 275 | } |
| 276 | |
| 277 | module_init(cs5520_ide_init); |
| 278 | |
| 279 | MODULE_AUTHOR("Alan Cox"); |
| 280 | MODULE_DESCRIPTION("PCI driver module for Cyrix 5510/5520 IDE"); |
| 281 | MODULE_LICENSE("GPL"); |